Replying to
@KekunPlazas So I suppose it started after a kernel upgrade? Maybe with a older kernel work fine?
Btw: you can try this kernel option as a workaround: amdgpu.gpu_recovery=1. It should make it less painful, because it reset automaticaly the gpu in working state.
Also you can try to disable gpu acceleration inside firefox. I never tried because in my case the problem was only with some old 3d games.
Last chance: you can alse try to use the old driver radeon. It should be possible, but I never tried this rabbit hole...